# CVE-2026-41929: Givanz Vvveb CMS reflected XSS in visual editor preview renderer

Source: https://junglewise.ai/threats/cve-2026-41929-givanz-vvveb-cms-reflected-xss-in-visual-editor-preview-renderer  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-07. Updated: 2026-07-14  
License: CC BY 4.0 with a link back

CVE-2026-41929 · Severity: medium · CVSS 6.1 · Published 2026-05-07

Vvveb CMS, a website building and content management platform, contains a security flaw in its visual editor. An attacker can trick a user (such as an administrator) into clicking a malicious link, which then executes unauthorized code in their browser. This could allow the attacker to steal login sessions, take over accounts, or modify website content.

Technologies: [Givanz Vvveb CMS](https://junglewise.ai/threats/technologies/vvveb-cms). Vendors: [Givanz](https://junglewise.ai/threats/vendors/givanz).

## Quick answers

**Is CVE-2026-41929 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-41929 being exploited in the wild.

**How severe is CVE-2026-41929?** Medium severity, with a CVSS score of 6.1, published 7 May 2026.

**Which products and versions are affected?** Givanz Vvveb CMS before 1.0.8.2.

**Is there a fix for CVE-2026-41929?** A patch was published on 2026-05-04: Fix committed and version 1.0.8.2 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-41929 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-41929?** Check whether you run Givanz Vvveb CMS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A reflected cross-site scripting (XSS) vulnerability exists in Vvveb CMS due to insufficient authentication and input sanitization in the visual editor's preview functionality. The 'isEditor()' function in 'system/functions.php' incorrectly validates editor status based solely on the presence of the 'r' query parameter without verifying sessions or roles. Consequently, the view handler in 'system/core/view.php' accepts raw HTML from the 'html' POST parameter and injects it directly into the response body when '_component_ajax' is present. An unauthenticated attacker can exploit this by crafting a malicious link or auto-submitting form to execute arbitrary JavaScript in a victim's browser. This vulnerability was patched in version 1.0.8.2 by adding proper admin and user key checks.

## Affected products

- givanz Vvveb CMS before 1.0.8.2

## Timeline

- 2026-04-27: other: Vulnerability validated
- 2026-05-04: patched: Fix committed and version 1.0.8.2 released
- 2026-05-04: advisory: GitHub Security Advisory published
- 2026-05-07: disclosed: CVE published to NVD

## References

- [https://github.com/givanz/Vvveb/commit/54a9e846fb94192f1b31ae81d81d25c874662e6a](https://github.com/givanz/Vvveb/commit/54a9e846fb94192f1b31ae81d81d25c874662e6a)
- [https://github.com/givanz/Vvveb/releases/tag/1.0.8.2](https://github.com/givanz/Vvveb/releases/tag/1.0.8.2)
- [https://github.com/givanz/Vvveb/security/advisories/GHSA-wwmv-4g9g-p48g](https://github.com/givanz/Vvveb/security/advisories/GHSA-wwmv-4g9g-p48g)
- [https://www.vulncheck.com/advisories/vvveb-unauthenticated-reflected-xss-via-visual-editor](https://www.vulncheck.com/advisories/vvveb-unauthenticated-reflected-xss-via-visual-editor)

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